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Greater Water Parsnip

Sium latifolium

Please keep in mind that it is illegal to uproot a plant without the landowner's consent and care should be taken at all times not to damage wild plants. Wild plants should never be picked for pleasure and some plants are protected by law.
For more information please download the BSBI Code of Conduct PDF document.

Contents

Plant Profile

Flowering Months:
JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC
Order:
Apiales
Family:
Apiaceae (Carrot)
Type:
Flower
Life Cycle:
Perennial
Maximum Size:
2 metres tall
Habitats:
Ditches, fens, marshes, riverbanks, riversides, swamps, waterside, wetland.

Flower:
֍
White, 5 petals
 
Small white flowers in umbels of 5 to 10cm across. Flowers have large bracts. Pollinated by flies, bees and beetles.
Fruit:
The fruits are egg-shaped with prominent ridges.
Leaves:
A hairless perennial plant with hollow, ridged stems. The leaves are 1-pinnate, each with about 5 pairs of toothed leaflets. The leaves measure up to 30cm (12 inches) long. Their stalks clasp the stems. The submerged leaves are finely cut.
Other Names:
Broad-leaved Water Parsnip, Greater Water-parsnip, Wideleaf Waterparsnip.
Frequency (UK):
Unusual  

Other Information

Summary

Sium latifolium, also known as broad-leaved water parsnip, is a perennial herb in the family Apiaceae. It is native to Europe and western Asia, and typically grows in marshy or wet areas, such as along the edges of ponds, streams, and rivers. The plant has broad, green leaves and small, white flowers that grow in clusters. Its root is edible and has a similar taste and texture to a domestic parsnip. Sium latifolium is not commonly consumed as other edible roots and it is not considered to be toxic.

Blog

Greater Water Parsnip, or Sium latifolium, is a perennial herbaceous plant that is commonly found growing in wetland habitats such as marshes, swamps, and riverbanks. It is native to Europe and western Asia, but has since been introduced to North America where it has become naturalized in many regions.

The plant can grow up to six feet tall and has a stout, hollow stem that is covered in fine hairs. Its leaves are large, with an average length of about 10 inches, and are arranged in an alternate pattern along the stem. They are dark green in color and have a glossy texture. The flowers of the Greater Water Parsnip are small and white, and are arranged in large, umbrella-like clusters that can measure up to eight inches across.

One of the most notable characteristics of the Greater Water Parsnip is its pungent smell. The plant gives off a strong, almost skunky odor that can be quite overpowering in dense populations. Despite this, the plant is considered to be an important food source for many wetland animals, including insects, birds, and mammals.

In addition to its ecological importance, the Greater Water Parsnip has also been used for medicinal purposes for centuries. Its roots contain compounds that have been shown to have anti-inflammatory and pain-relieving properties, and it has been used to treat a variety of ailments, including rheumatism and gout.

However, it is important to note that the Greater Water Parsnip can be toxic to humans if ingested in large quantities. The plant contains a number of toxic compounds, including furanocoumarins, which can cause severe skin reactions in some people. It is therefore recommended that anyone handling the plant wear gloves and protective clothing.

While the Greater Water Parsnip is not a particularly popular plant for cultivation in gardens, it can be a valuable addition to wetland restoration projects or naturalized areas. Its large size and attractive foliage make it a visually striking addition to the landscape, and it can help to stabilize soil and prevent erosion in wetland habitats.

The plant prefers full sun to partial shade and moist to wet soil conditions, making it well-suited to wetland environments. It can be propagated from seed or by division, but care should be taken to prevent the spread of the plant to non-wetland areas.

In some regions, the Greater Water Parsnip has become an invasive species, displacing native plants and disrupting wetland ecosystems. Efforts to control its spread have included manual removal and the use of herbicides, although these methods can be difficult and costly.

In addition to its ecological and medicinal value, the Greater Water Parsnip also has cultural significance in some regions. In Europe, it was once used as a symbol of protection against evil spirits and was often planted near homes and churches for this purpose.

The plant has also been used in traditional folk medicine to treat a variety of ailments, including respiratory infections, skin conditions, and digestive issues. However, it is important to note that there is limited scientific research to support these uses, and anyone considering using the plant for medicinal purposes should consult with a healthcare professional.

Unfortunately, like many wetland plants, the Greater Water Parsnip is threatened by habitat loss and degradation. Wetland ecosystems are often among the most impacted by human activities, and as a result, many wetland species are at risk of extinction.

Efforts to protect and restore wetlands can help to ensure the survival of plants like the Greater Water Parsnip and the many other species that rely on these unique habitats. Conservation measures can include the protection of wetland areas, the restoration of degraded wetlands, and the implementation of policies and practices that support the long-term health and vitality of these important ecosystems.

Another interesting aspect of the Greater Water Parsnip is its relationship with pollinators. The plant is known to attract a variety of insect pollinators, including bees, wasps, and butterflies, which are essential for the plant's reproduction. The large, umbrella-like clusters of flowers provide a rich source of nectar and pollen for these insects, making the plant an important food source for many species.

In addition to its role in wetland ecosystems, the Greater Water Parsnip has also been used in landscaping and garden design. Its tall, striking form and glossy green foliage make it a popular choice for creating vertical interest in garden beds and borders. It can also be grown in containers or water gardens for a dramatic effect.

Overall, the Greater Water Parsnip is a fascinating plant with a rich history and many interesting characteristics. Whether admired for its ecological importance, medicinal properties, or aesthetic appeal, it serves as a reminder of the beauty and complexity of the natural world and the importance of protecting and preserving our wetland ecosystems.


Facts about the Greater Water Parsnip

Here are some interesting facts about the Greater Water Parsnip:

  1. The plant is also known by several other common names, including Water Parsnip, Broad-leaved Water Parsnip, and Lesser Marshwort.

  2. The Greater Water Parsnip can grow up to six feet tall, making it one of the largest wetland plants in many regions.

  3. The plant is native to Europe and western Asia but has been introduced to North America, where it has become naturalized in many areas.

  4. The Greater Water Parsnip has a pungent odor that can be quite overpowering, and it is often described as having a skunky smell.

  5. The plant has been used in traditional medicine for centuries to treat a variety of ailments, including rheumatism and gout.

  6. The Greater Water Parsnip is an important food source for many wetland animals, including insects, birds, and mammals.

  7. The plant is threatened by habitat loss and degradation, as wetland ecosystems are among the most impacted by human activities.

  8. The Greater Water Parsnip is also an important species for wetland restoration projects and can help to stabilize soil and prevent erosion in wetland habitats.

  9. The plant attracts a variety of insect pollinators, including bees, wasps, and butterflies, which are essential for its reproduction.

  10. While the Greater Water Parsnip can be toxic to humans if ingested in large quantities, it is an important and valuable plant that deserves our attention and respect.

 

Distribution Map

Reproduced by kind permission of the BSBI.

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